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To expand on my previous: Undaunted by aerodynamic reality, the design team at Pilatus/Britten-Norman has announced plans for the BN2-XL (Extra Loud), promising more noise, reduced payload, a lower cruise speed, and increased pilot workload. We spoke to Mr. Fred Gribble, former British Rail boilermaker and now Chief Project Engineer. Fred was responsible for developing many original and creative design flaws in the service of his former employer, and assures he will be incorporating these in the new BN2-XL technology under a licensing agreement. Fred reassured BN-2 pilots however that all fundamental design flaws of the original model had been retained. Further good news is that the XL version is available as a retrofit. Among the new measures is that of locking the ailerons in the central position, following airborne and simulator tests which showed that whilst pilots of average strength were able to achieve up to 30° of control wheel deflection, this produced no appreciable variation in the net flight path of the aircraft. Thus the removal of costly and unnecessary linkages has been possible, and the rudder has been nominated as the primary directional control. In keeping with this new philosophy, but to retain commonality for crews transitioning to the XL, additional resistance to foot pressure has been built into the rudder pedals to prevent overcontrolling in gusty conditions (defined as those in which wind velocity exceeds 3 knots). An outstanding feature of Islander technology has always been the adaptation of the 0-540 engine, which mounted in any other aircraft in the free world (except the Trislander) is known for its low vibration levels, so as to cause it to shake and batter the airframe, gradually crystallise the main spar, desynchronise the accompanying engine, and simulate the sound of fifty skeletons fornicating in an aluminium dustbin. Britten-Norman will not disclose the technology they applied in enhancing this effect in the XL, but Mr. Gribble assures us it will be perpetuated in later models and sees it as a strong selling point; "After all, the Concorde makes a lot of noise," he said, "and look how fast it goes." However, design documents clandestinely recovered from the Britten-Norman shredder have solved a question that has puzzled aerodynamicists and pilots for many years, disclosing that it is actually noise which causes the BN-2 to fly. The vibration set up by the engines and amplified by the airframe, in turn causes the air molecules above the wing to oscillate at atomic frequency, reducing their density and causing lift. This can be demonstrated by sudden closure of the throttles, which causes the aircraft to fall from the sky. As a result, lift is proportional to noise rather than speed, explaining amongst other things the aircraft's remarkable takeoff performance. In the driver's cab (as Gribble describes it), ergonomic measures will ensure that long-term PBN pilots' deafness does not cause inflight dozing. Orthopaedic surgeons have designed a cockpit layout and seat to maximise backache, enroute insomnia, chronic irritability, and terminal (post-flight) lethargy. Redesigned 'bullworker' elastic aileron cables, now disconnected from the control surfaces, increase pilot workload and fitness. Special noise retention cabin lining is an innovation on the XL, and it is hoped in later models to develop cabin noise to a level which will enable pilots to relate ear pain directly to engine power, eliminating the need for engine instruments altogether. We were offered an opportunity to fly the XL at Britten-Normans' developmental facility, adjacent to the Britrail tea rooms at Little Chortling. (The flight was originally to have been conducted at the Pilatus plant, but aircraft of Britten-Norman design are now prohibited from operating in Swiss airspace during the avalanche season). For our mission profile, the XL was loaded with fossil fuel for a standard 100 nm with Britrail reserves, carrying one pilot and nine passengers to maximise discomfort. Passenger loading is unchanged, the normal under-wing protrusions inflicting serious lacerations on 71% of boarding passengers, and there was the usual entertaining confusion in selecting a door appropriate to the allocated seat. The facility for the clothing of embarking passengers to remove oil slicks from engine cowls during loading has also been thoughtfully retained. Startup is standard, and taxying, as in the BN-2, is accomplished by brute force. Takeoff calculations called for a 250 decibel power setting, and the rotation force for the (neutral) C of G was calculated as 180ft/lbs of back pressure. Initial warning of an engine failure during takeoff is provided by a reduction in flight instrument panel vibration. Complete seizure of one engine is indicated by the momentary illusion that the engines have suddenly and inexplicably become synchronised. Otherwise, identification of the failed engine is achieved by comparing the vibration levels of the windows on either side of the cabin. (Relative passenger pallor has been found to be an unreliable guide on many BN-2 routes because of ethnic considerations). Shortly after takeoff the XL's chief test pilot, Capt. "Muscles" Mulligan, demonstrated the extent to which modem aeronautical design has left the BN-2 untouched; he simulated pilot incapacitation by slumping forward onto the control column, simultaneously applying full right rudder and bleeding from the ears. The XL, like its predecessor, demonstrated total control rigidity and continued undisturbed. Power was then reduced to 249 decibels for cruise, and we carried out some comparisons of actual flight performance with graph predictions. At 5000' and ISA, we achieved a vibration amplitude of 500 CPS and 240 decibels, for a fuel flow of 210 lb/hr, making the BN-2 XL the most efficient converter of fuel to noise since the Titan rocket. Exploring the constant noise-variable speed and constant speed-variable noise concepts, we found that in a VNE dive, vibration reached its design maximum at 1000 CPS, at which point the limiting factor is the emulsification of human tissue. The catatonic condition of long term BN-2 pilots is attributed to this syndrome, which commences in the cerebral cortex and spreads outwards. We asked Capt. Mulligan what he considered the outstanding features of the XL. He cupped his hand behind his car and shouted. "Whazzat?" We returned to Britten-Norman field convinced that the XL model retains the marque's most memorable features, while showing some significant and worthwhile regressions. Pilatus/Britten-Norman are however not resting on their laurels. Plans are already advanced for the three-engined Trislander XL, and noise tunnel testing has commenced. The basis of preliminary design and performance specifications is that lift increases as the square of noise, and as the principle of acoustic lift is further developed, a later five-engined vertical takeoff model is another possibility.

Here is our very own Australian Bug, based at Rollo’s Airfield near Murray Bridge, SA. It is Jabiru 3300 powered and tops out at close to 200ktas.

This bloke has a very good 15 minute video of why he bought a Cozy MKIV Canard aircraft, and what the drawbacks are in their design. In essence, despite being promoted as "stall-proof", they're tricky to fly. A flapless wing (the design can't be fitted with flaps) makes for high speed takeoffs and landings, meaning a longer runway is needed. The tiny undercarriage and high landing/takeoff speeds means it is unsuitable for rough airstrips - and most importantly, a narrow C of G, and strict attention to load positioning, means you can't afford any mistakes in that load positioning. When he flies alone, he has two bags of shot that are required on board to balance the aircraft - and fat friends in the passenger seat, are out. So, not an aircraft that appeals to all, as it's quite unforgiving in numerous areas. Obviously, this bloke loves the advantages - high cruise speed, low fuel consumption, and a reduction in engine noise. He's a good presenter, with clear simple information and explanations - a lot of YouTubers would do well to copy his informative style.

Lucky the rego on the bottom one doesn't end in an H

Some pics from my visit to the CallAir Museum in 2013. Glen Call was my guide.

I built a 1/4 scale R/C Jungmeister from plans. It spun to the ground on about the fourth flight, moved onto ultralights after that heart break.

It was disappointing that Garry was much maligned by some. He produced a design that is exceptionally strong and with a performance envelope as good as and often better than many plastic fantastics even today and that was 11 years ago. I was at his factory a number of times when people would call in & he would stop and show them around and discuss anything they asked about. When things got very busy he had some young people come in for work experience and in the case of the Sierra that hit the Ferris Wheel there were a few issues of holes being drilled in the wrong place etc. That may have been from inexperienced staff and the bits were not replaced so got picked up by ATSB and blown out of all proportion even though they had nothing to do with the incident. Scapegoats are always needed in public situations and they found one. So Garry lost his Factory licence, his Instructor rating and what was left of his faith in the system. The Ferris wheel aircraft was rebuilt and flew again well. It was eventually sold at a significant discounted price due to the history, nothing else. That incident cost Australia one of its most innovative aircraft designers and manufacturers. Garrys first love was Gliding and he is now in one of the best parts of the world to continue this. I am not sure how the structural failure event has changed anything as I have heard nothing since.

Gary's probably gone into hiding, to avoid this God-bothering idiot, below. I've never seen so much religious rubbish posted on one website. http://www.the-testament-of-truth.com/truth/web/gary1.htm

FIDO Fog Investigation and Dispersal Operation (which was sometimes referred to as "Fog Intense Dispersal Operation" or "Fog, Intense Dispersal Of") was a system used for dispersing fog and pea soup fog (dense smog) from an airfield so that aircraft could land safely. The device was developed for British RAF bomber stations, allowing the landing of aircraft returning from raids over Germany in poor visibility by burning fuel in rows on either side of the runway. https://en.wikipedia.org/wiki/Fog_Investigation_and_Dispersal_Operation If you watch the film towards the end when the use of FIDO is shown, you see someone put a tag with the drawing of a dog on it beside the name of an airfield where FIDO was available.

EJJ is the Cavalier that flew from NZ and was based at Heck field , the owner built it in NZ he was a German guy Gunter it ws in the same hangar as our aircraft

I suspect the Jodel in the third pic is unrelated

I scratch built one of these as a scale control line model with a third line throttle control many years ago. Sadly, it never flew but I still have the now very much worse for wear relic that I can't bring myself to part with. All the numbers and decals were hand painted. It's hardly a competition winner but not bad for a 16 year old. Never thought that one day I'd have a pilot's licence and build a real aircraft.

Unless it's an optical illusion, there seems to be a small hinged door on the port side of the front cockpit visible in the yellow one.

And our very own one at Goolwa, albeit stretched.

As a slight thread drift, I have a huge (6ft long) photo adorning my lounge room wall of Sunderland VH-BRF coming into land on the lagoon at Lord Howe Island back in 1974. These old aircraft had quite interesting history's, and VH-BRF was no exception if anyone is interested reading about it in the attached link. https://aussieairliners.org/shortfb/vh-brf/vhbrf.html

That's terrifying!........deep respect for the test pilot/s........

That's a pretty awesome plane. Van's Aircraft is celebrating its 50th anniversary this year. More than 13,000 flying now. Van's total performance is a real thing.

Many years ago I saw 3676 at (I think) Goolwa, SA. It took me a while for the blue painted script name to register:- "Proctalgia" When looking for a plane to build I considered the Rebel, but thought it a tad heavy for RaAus rego.

Nev, Wood and fabric may be old fashioned skills BUT they are materials that are better suited to repair than composites and easier than metal... and potentially more 'green' than the fashionable composites. This coming from a middle aged fart who has built and played in all construction methods and I am trending back towards wood and fabric for my last two aircraft and looking at replacing the composite wing on one of mine with replacement in wood n fabric.

Back to the Sierra: years ago I dropped in to Garry’s Taree factory for some industrial espionage- I was looking for design ideas for my wing flaps. Garry is the sort of energetic, Can-Do bloke this country is running short of. He insisted I go for a fly. His son took me up in a Sierra and impressed me with its stability and speed.

Garry was (is?) a member of this forum, and his profile spells his name with 2 R's - Garry.

The A-12 Oxcart was built for the CIA as a single seater and could fly 10,000 feet higher than the SR-71, had a top speed of Mach 3.35 (SR-71 3.2), but a shorter range. Its first flight was April 26 1962 and it was retired 1968 following a catfight with USAF who wanted the glory (the SR-71 flew from 1966 - 1999). The CIA flew the Oxcarts out of Area 51 on Groom Lake. The book Area 51 by Annie Jacobsen describes the early days of the Oxcart reconnaisance of Russia. The aircraft skins were made of Titanium and after a flight remained so hot that several mechanics were badly burned when they started working on them too soon. The Russians used to overfly Area 51 and the mechanics would sit an Oxcart out on the apron and use gas heaters to heat the skin so it would be giving an infra red heat signal when the Russians arrived. The aircraft were retired when the CIA were able to put photographic equipment into satellites and take the same pictures from orbit in the comfort of their offices. This photo of Groome Lake, Nevada shows the long runways across the lake. To the right of the solid line is another, longer runway which curves around to the right giving the pilot a lot more length. Groom Lake is a satellite field of Nellis Air Force Base. I flew a Cherokee over Nellis AFB in 1979 on the way to the Grand Canyon. Groom Lake is not far away, but I didn't know about it then. Will have to go back some time.

The best looking military jet of its time.

The Bantam was designed and built by Max Clear who had his own airfield at Te Kowhai near Hamiltion in NZ. Max was an amazing aviator and I lived not far away and used to watch him doing very good aerobatics in the Pitts he built in the 70s from my veranda on warm Summer evenings. At the peak of production his company Micro Aviation was shipping quite a few to South Africa each month & he had various people helping to build them. I got to fly a few and they were delightful. All of the Bantams I flew were 2 stroke Rotax powered. Sadly Max died of cancer in 2011 and his family were not interested in the business or aviation. The business sold but at the time in 2012 the airfield did not. There were 6 hangars there at the time. Total production before Max's death was 354 Bantams. The airfield was eventually sold to a private consortium and they hold flying events and country fairs etc there. I flew the C172 and Archer in many times & there was always a great welcome, cup of tea & a yarn.

But Nev that was in the days when an air ticket cost a year’s pay.

There is a photo of the fuselage of the first one received in 2004 on the Avspecs website & it is almost unrecognisable. I imagine they just removed all the fittings & completely built a brand new airframe & wings. The photos they have of the new wings and fuselage show impeccable workmanship which is reflected in the videos of the finished product. There is another Mossie that has recently been found in a shed in Mapua near Nelson. The old bloke, John Smith died 6 months ago and he was an avid collector of old military aircraft. He had a P51, Tiger Moth, Vampire, 2 x P40s as well as multiple bits of many different aircraft. The Mossie looks in pretty good nick & is going to be restored and displayed at Omaka as far as I know. It looks like it would easily be able to be restored to flying condition though. Details are HERE

Most of the Coachwood was sourced in North Queensland by forester Ian Gillison, who worked for the Commonwealth Foresty Bureau in Mackay. His sons now live in Yungaburra and near Albury. Many wooden propellors used in WW2 planes were made of North Queensland rainforest timbers. The Venables sawmill in Cairns handled a lot of the timber. My father flew Mosquitoes in 85 Squadron and mostly in night fighters. Also late in the war dropped propaganda pamphlets over France and Italy to demoralise German troops. Very high casualty rate, of the 70 guys he started with only six were left at the end of the war.

Ceratopetalum apetalum, the coachwood, scented satinwood or tarwood, is a medium-sized hardwood tree, straight-growing with smooth, fragrant, greyish bark. It is native to eastern Australia in the central and northern coastal rainforests of New South Wales and southern Queensland, where is often found on poorer quality soils in gullies and creeks and often occurs in almost pure stands. Its timber is light and easily worked. It is used for flooring, furniture and cabinetwork, interior fittings, turnery, gun stocks, wood carving, veneers as well as spars and masts for boats. Courtroom number three of The High Court of Australia is beautifully and completely furnished with coachwood timber. The Genus Ceratopetalum includes C. gummiferum, the New South Wales Christmas bush. (I love that bloody tree.)

Landing distance required is ONLY 1900 Metres (approx. 1 Nm.) Nev

Needs more take-off distance as it is underpowered . Nev

I remember the ME163 mainly because of the extremely reactive fuels it used. I didn’t know until now that it had gone transonic. According to Wikipedia, the aircraft landed after that 700 mph flight with almost all of the vertical rudder surface broken away from flutter. The wing sweep stemmed from its tailless nature and the need to balance the centre of gravity and centre of lift positions for stability purposes, not from any high speed aerodynamic requirements There is one in the Australia War Memorial in Canberra. It was captured by the British, taken to England for evaluation and presented to the Australian government in 1946.

Mr Google says top of range is US $ 350k which computes to OZ $ 540,000 .................. I think 20:1 glide ratio looks real good (price not so good)

Thank you Red 750, My R80 (BushCaddy kit number 105) was to my knowledge the second one to fly in Australia, now over 19 years ago. It still serves me very well.

Having nothing much in front of you for a pitch reference makes this sort of thing more difficult to fly than a more normal design. A breezy has a similar problem. Nev

Probably not the best name for a warplane!

Endurance of 5.5 hrs is 17.3 litres/hour. Quite sporting for a 150 hp Lycoming. That is much more than Pazmany claims - maximum of 4.1 hrs but only with the 108 hp Lycoming 0-235 engine fitted.

Nev, Wikipedia has a basic level of info on MMA, but Geoff Goodall has the comprehensive story. He split the MMA story into two parts, the S.A. part and the W.A. part. Geoffs story is interesting, informative and well written, as is his competent style. https://www.goodall.com.au/australian-aviation/mma-1/mma.html https://www.goodall.com.au/australian-aviation/mma-2/mma2.html https://www.goodall.com.au/photographs/mma-70/70smma.html https://en.wikipedia.org/wiki/MacRobertson_Miller_Airlines MMA had the 3rd worst airline crash in Australia, when one of their Vickers Viscounts (VH-RMQ) lost a wing just out of Port Hedland on descent, on NYE 1968. All 26 on board were killed - a good mate was supposed to be on the flight, but picked up a bug and couldn't fly, and another bloke in his company took his place. https://en.wikipedia.org/wiki/MacRobertson_Miller_Airlines_Flight_1750

Here you go. Side by side.

Here is a screen print of the Wiki page: As you can see, there are a number of variants, as indicated in the text above the photos. all-aero.com lists specs for 6, with different wingspan and area for most, so it depends which model you are referring to. The input form for these profiles only has provision for one set of specs.

Harold the Helicopter....as featured in the Thomas the Tank Engine books....) Westland Harold???

Imagine the fuel consumption at full throttle, of 4 x R-3350's!! I believe these engines were capable of 3,700HP for a short period, but 2,200HP was their cruise setting. They commenced their life as a relatively unreliable engine, but constant refinement (and no doubt, millions of dollars) saw them become a very reliable engine, with many operators running them to 3,000 hrs before overhaul. Wrights had a lot of big end bearing failures, and they set to, to find better bearing materials. They finally settled on a silver bearing, with a lead, then an indium overlay. This bearing material turned out to be an exceptional product, and it's reported that one operator sent in a bearing that had done 7000 hrs - and Wright examined it, and advised that it was still suitable for re-installation!

Here's a YouTube video of the TU-144 story. The rumours that it was merely a copy of the Concorde were proven to be incorrect, as the TU-144 was longer, heavier, and faster than the Concorde - and it sported retractable front canard wings to assist with lift. But apparently, the cost of all the Russian one-upmanship was the noise of the afterburners inside the TU-144 was dreadful, resulting in normal conversation becoming impossible, and passenger having to converse with written notes.

She's a beauty for sure, but MTOW is fairly low at 472.5kg. If it takes 70L of fuel that's around 50kg, leaves only 125kg for pilot, passenger and luggage. Not sure I can fit passenger and luggage in 25kg!

The gold dredges at Bulolo were designed with the Junkers in mind. The largest dredge component was the tumbler shaft and it was sized with length, width and weight to be carried by the Junkers. I have stood on the deck of those abandoned dredges in dense undergrowth, a moving experience.

There's a great story below, on the F.13 Junker replica built by Rimowa, the luxury luggage manufacturer. The Rimowa company CEO is a dedicated aviator, and the company aircraft is a Embraer Phenom jet, which the CEO flies himself. The replica aircraft was built from photographic scans of a museum example, and as many of the few original plans they could find. It has been repowered with a 450HP P&W radial, a serious power upgrade over the original 310HP engine. The cockpit is spartan, to say the least, but modern instrumentation brings it up to speed. https://www.gq-magazine.co.uk/article/rimowa-f13

After the war Goering said that as soon as he saw Allied fighters over Berlin “he knew the jig was up”. He knew they’d lose, yet the asshole sent a few hundred thousand more of his young men off to die.

De Havilland obviously took Ettore Bugatti's famous comment to heart. When Bugatti's race drivers complained the heat from the Bugatti front brakes was transferring to the alloy wheels and melting the tyre beads, Ettore raged in response, "My cars are made to GO! - not STOP!" He never did anything to fix the problem, just told his drivers not to brake so much. The DH.88 Comet was obviously made to go fast, everything else was secondary.

I don't know what armament a Mossie carried but many were used for high alt. photo reccie. Many are unaware they eventually made a metal one called a Hornet that operated from Carriers. Nev

Yeah "fighting for peace" is like "F***ing for virginity".